#!/bin/bash

toolName=postfixadmin
toolPhpDeps='php${PFA_PHP_VERSION}-fpm php${PFA_PHP_VERSION}-imap php${PFA_PHP_VERSION}-mbstring php${PFA_PHP_VERSION}-mysql php${PFA_PHP_VERSION}-json php${PFA_PHP_VERSION}-curl php${PFA_PHP_VERSION}-zip php${PFA_PHP_VERSION}-xml php${PFA_PHP_VERSION}-bz2 php${PFA_PHP_VERSION}-intl php${PFA_PHP_VERSION}-gmp'
toolConfName="config.local.php"
toolTemplates="templates_c"
toolTemplatesLoc="$PFA_SRV_LOC/$toolTemplates"
toolAdditionsLoc="$PFA_SRV_LOC/ADDITIONS"
latestUrl="https://api.github.com/repos/$toolName/$toolName/releases/latest"
fetchmailDeps="fetchmail liblockfile-simple-perl"

# Get script working directory
# (when called from a different directory)
WDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >>/dev/null 2>&1 && pwd )"
CONFIG=0
CONFIG_FILE_NAME="${toolName}.cfg"
CONFIG_FILE_TEMPLATE="$WDIR/${CONFIG_FILE_NAME}.example"

step_config() {
  initSeqConfig "$CONFIG_FILE_NAME" "$CONFIG_FILE_TEMPLATE"
  if [ $? -eq 0 ] ; then
    echo "     ${toolName} path:   ${PFA_WEB_LOC}"
    echo "     ${toolName} backup: ${PFA_BACKUP}"
    echo "             php Version: ${PFA_PHP_VERSION}"
    CONFIG=1
  fi
}

step_1_info() { 
  # eval needed to expand sourced configuration variables
  local localDeps=`eval "echo \"$toolPhpDeps\""`
  echo "Install $toolName dependencies:"
  echoinfo "$localDeps"
}
step_1_alias() { ALIAS="install"; }
step_1() {
  # eval needed to expand sourced configuration variables
  local localDeps=`eval "echo \"$toolPhpDeps\""`
  local aptOpt=
  if [ $QUIET -ne 0 ];then
    aptOpt="-y"
  fi
  exe apt update
  exe apt install $localDeps $aptOpt
}

step_2_info() { echo "Install $toolName to $PFA_SRV_LOC"; }
step_2() {
  step upgrade
}

step_3_info() { echo "Install fetchmail"; }
step_3_alias() { ALIAS="install_fetchmail"; }
step_3() {
  local aptOpt=
  if [ $QUIET -ne 0 ];then
    aptOpt="-y"
  fi
  exe apt install $fetchmailDeps $aptOpt
  endReturn -o $? "Failed to install fetchmail"
  exe systemctl stop fetchmail
  exe systemctl disable fetchmail
  echo " [I] Create lock folder"
  exe mkdir -p "$fetchmailLockDir"
  exe chown ${fetchmail}: "$fetchmailLockDir"
}
fetchmailUser="fetchmail"
fetchmailLockDir="/var/lock/fetchmail"

step_4_info() { echo "Configure postfixadmin to use fetchmail"; }
step_4() {
  echo "# Create mysql config"
  echo "  [$PFA_SRV_LOC/fetchmail.conf]"
  echo "   # Follow instructions in $toolAdditionsLoc/fetchmail.pl"
  echo
  echo "  [$toolAdditionsLoc/fetchmail.pl]"
  echo "   # Change path to fetchmail.conf (see above)"
  echo
  echo " [I] Run step cron when configuration is done"
}

step_6_info() { echo "Create postfixadmin fetchmail plugin cron"; }
step_6_alias() { ALIAS="cron"; }
step_6() {
  addConf -s "$fetchPluginCron" "$fetchPluginCronLoc"
}
fetchPluginCronLoc="/etc/cron.d/fetchmailplugin"
fetchPluginCron="*/1 * * * * fetchmail /srv/postfixadmin/ADDITIONS/fetchmail.pl > /dev/null"

step_18_info() { echo "Check for updates"; }
step_18_alias() { ALIAS="updatecheck"; }
step_18() {
  shift
  local isInstalled=
  local latestVersion=
  if [ ! -z $1 ] ; then
    latestVersion="$1"
  else
    latestVersion=$(curl --silent "$latestUrl" | grep -Po '"tag_name": "postfixadmin-\K.*?(?=")')
  fi

  isInstalled=$(grep -E "${latestVersion}" "${PFA_WEB_LOC}/version" >>/dev/null 2>&1 && echo "1" || echo "0")
  if [ $isInstalled -eq 1 ] ; then
    echo " [I] Version $latestVersion is already installed"
    return 1
  else
    echo " [I] Update to $latestVersion available"
  fi
  return 0
}


step_20_info() { 
  echo -n "Create a backup [POSTFIXADMIN SRV ROOT]"
  if [ $CONFIG -ne 0 ] ; then
    echo " at $PFA_BACKUP"
  else
    echo
  fi
}
step_20_alias() { ALIAS="backup"; }
step_20() {
  shift
  local tempRoot=
  if [ $CONFIG -eq 0 ] ; then
    echoerr " [E] No configuration file found"
    return 1
  fi
  if [ ! -z $PFA_BACKUP ] ; then
    exe mkdir -p "$PFA_BACKUP"
  fi
  if [ ! -z $1 ] ; then
    tempRoot="$1"
  else
    tempRoot="$PFA_SRV_LOC"
  fi

  local srvBackup="$PFA_BACKUP/${toolName}_`date +%Y%m%d-%H%M%S`.tar.gz"
  echo " [I] Backing up server directory to $srvBackup"
  exe cd "$tempRoot/.."
  exe tar czf "$srvBackup" $(basename "$tempRoot")

  exe $WDIR/mysql.sh -qq backup "$PFA_DATABASE" "$PFA_BACKUP"
}

step_22_info() {
  shift
  if [ -z $1 ] ; then
    echo -n "Get latest version from github"
    if [ $CONTEXT_HELP -eq 0 ] ; then
      echo ": $(curl --silent "$latestUrl" | grep -Po '"tag_name": "postfixadmin-\K.*?(?=")')"
    else
      echo " [CUSTOM VERSION]"
    fi
  else
    echo "Get version $1 from github"
  fi
}
step_22_alias() { ALIAS="upgrade"; }
step_22() {
  shift # don't need step number
  local latestVersion=
  if [ ! -z $1 ] ; then
    latestVersion="$1"
  else
    latestVersion=$(curl --silent "$latestUrl" | grep -Po '"tag_name": "postfixadmin-\K.*?(?=")')
  fi

  if [ -z $latestVersion ] ; then
    echoerr " [E] Cannot determine latest version from github repository"
    return 1
  elif [ $QUIET -eq 0 ] ; then
    echo
    exe read -p "Install $latestVersion to $PFA_SRV_LOC [n]o/(y)es? " answer
    case $answer in
      [yY])
        ;;
      *)
        echoerr " [I] Upgrade aborted"
        return 1
        ;;
    esac
  fi

  # Major versions are stated in the CHANGELOG.TXT without the trailing minor version e.g. "3.3" for "3.3.0"
  # Trailing ".0" is removed if exists
  local isInstalled=$(grep -E "Version ${latestVersion%.0} " "${PFA_SRV_LOC}/CHANGELOG.TXT" >>/dev/null 2>&1 && echo "1" || echo "0")
  if [ $isInstalled -eq 1 ] ; then
    echoerr " [E] Version $latestVersion is already installed"
    return 2
  fi
  
  # Download
  local downUrl="https://github.com/$toolName/$toolName/archive/postfixadmin-${latestVersion}.tar.gz"
  local tempExtract="$tempDown/postfixadmin-postfixadmin-$latestVersion"
  
  if [ ! -e "$tempExtract" ] ; then
    exe mkdir -p "$tempDown"
    exe wget -O "$tempLoc" $downUrl
    endReturn -o $? "Download failed: $downUrl"
    exe cd "$tempDown"
    exe tar -xf "$tempLoc"
    endReturn -o $? "Extract failed: $tempLoc"
  else
    echo " [I] Found existing download: $tempExtract"
  fi

  # Installation
  local tempBu="${PFA_SRV_LOC}_bu_`date +%Y%m%d-%H%M%S`"

  if [ -e "$PFA_SRV_LOC" ] ; then
    exe mv "$PFA_SRV_LOC" "$tempBu"
    step backup "$tempBu"
    endReturn -o $? "Backup failed; $PFA_SRV_LOC renamed!"
  fi
  echo " [I] Installing version $latestVersion to $PFA_SRV_LOC"
  exe cp -ar "$tempExtract" "$PFA_SRV_LOC"
  exe mkdir -p $(dirname "$PFA_WEB_LOC")
  echo " [I] Create symlink to $PFA_WEB_LOC"
  exe ln -fs "$PFA_SRV_LOC/public" "$PFA_WEB_LOC"

  # Setting file permissions
  exe chown -R www-data: "$PFA_SRV_LOC/public"

  # Configuration
  local webConf="$tempBu/$toolConfName"
  if [ -e "$webConf" ] ; then
    echo " [I] Copying configuration"
    exe cp -ar "$webConf" "$PFA_SRV_LOC/"
  else
    echo " [I] Creating empty configuration file $PFA_SRV_LOC/$toolConfName"
    exep "echo -e \"# Created gy $WDIR/$(basename $0)\\n\\n# Changeme\" > \"$PFA_SRV_LOC/$toolConfName\""
  fi

  # Templates
  local templatesLoc="$tempBu/$toolTemplates"
  if [ -e "$templatesLoc" ] ; then
    echo " [I] Copying $toolTemplates"
    exe cp -ar "$templatesLoc" "$toolTemplatesLoc"
  else
    echo " [I] Creating empty directory $toolTemplatesLoc"
    exe mkdir -p "$toolTemplatesLoc"
    exe chown -R www-data: "$toolTemplatesLoc"
  fi

  exe rm -rf "$tempBu"
}
tempDown="/tmp/${toolName}"
tempLoc="$tempDown/${toolName}.tar.gz"

step_23_info() { echo "Clean temporary files: $tempDown"; }
step_23_alias() { ALIAS="clean"; }
step_23() {
  exe rm -rf "$tempDown"
}

step_100_info() { 
  echo "$toolName client script [OPTIONS]"
  echoinfo "[OPTIONS] are passed on to $toolName-cli unmodified"
}
step_100_alias() { ALIAS="cli"; }
step_100() {
  shift
  exe ${PFA_SRV_LOC}/scripts/$toolName-cli $@
}

VERSION_SEQREV=11
. /usr/local/bin/sequencer.sh